purcashing 1987 toyota supra soon, YAY! HG questions inside.

Kuban · 02-04-2007, 09:15 PM

If you are going to do the replacement right away it wouldnt be a bad idea either way. No matter how many miles the engine has on it. If its a stock hg, and the head bolts were torqed to fsm standards it could blow under randomness situations. BUT if the head bolts were torqed a little above fsm standards, say around 80ftlbs than i wouldnt worry about it if your running stock boost with no mods. But if you plan on changing it out heres what i recommend.

ARP Head studs
105.00$
@
https://935motorsports.com/catalog/p...oducts_id=1022

Cometic 2mm Steel Multi-Layer
169.00$
@
https://935motorsports.com/catalog/p...roducts_id=767

That would be a good setup. Then of coarse new gaskets for the things you end up doing in the process (Intake, exhaust, turbo-manifold etc.).

Total part will probably run you around 350$ or so. IF your doing the job yourself. My good friend whos a mechanic said the standard time for the 7m by shop standards is rated at about 12 hours labor. Depending on the shops labor charges, could be as much as 1000$ in labor to as little as 700$.
All in all its not costing you more than 1500$ tops to get the headgasket redone with a hg that will sustain 30psi all day long.
Now say the hg is already blown. Then were talking about pulling the engine and sending the block and head out to a machine shop and get then resurfaced. Prices on that are grey area. Just hope its not already blown basically.

Good Luck!

*EDIT* The 7m is a I-6, not a v6 as alot of people commonly confuse it, thus there only being (1) headgasket.

02-04-2007, 09:15 PM	#2
Kuban 3" Exhaust Join Date: Feb 2007 Location: Milwaukee, WI Posts: 174	If you are going to do the replacement right away it wouldnt be a bad idea either way. No matter how many miles the engine has on it. If its a stock hg, and the head bolts were torqed to fsm standards it could blow under randomness situations. BUT if the head bolts were torqed a little above fsm standards, say around 80ftlbs than i wouldnt worry about it if your running stock boost with no mods. But if you plan on changing it out heres what i recommend. ARP Head studs 105.00$ @ https://935motorsports.com/catalog/p...oducts_id=1022 Cometic 2mm Steel Multi-Layer 169.00$ @ https://935motorsports.com/catalog/p...roducts_id=767 That would be a good setup. Then of coarse new gaskets for the things you end up doing in the process (Intake, exhaust, turbo-manifold etc.). Total part will probably run you around 350$ or so. IF your doing the job yourself. My good friend whos a mechanic said the standard time for the 7m by shop standards is rated at about 12 hours labor. Depending on the shops labor charges, could be as much as 1000$ in labor to as little as 700$. All in all its not costing you more than 1500$ tops to get the headgasket redone with a hg that will sustain 30psi all day long. Now say the hg is already blown. Then were talking about pulling the engine and sending the block and head out to a machine shop and get then resurfaced. Prices on that are grey area. Just hope its not already blown basically. Good Luck! EDIT The 7m is a I-6, not a v6 as alot of people commonly confuse it, thus there only being (1) headgasket. Last edited by Kuban; 02-04-2007 at 09:19 PM.